From August 1941 to April 1945, hundreds of thousands of Serbs, Jews, and Romas, as well as anti-fascists of many nationalities, were murdered at the death camp known as Jasenovac. Estimates of the total numbers of men, women and children killed there range from 300,000 to 700,000. And yet, despite the scale of the crimes committed there, most of the world has never heard of Jasenovac. Following the Nazi invasion and dismemberment of Yugoslavia in April 1941, the "Independent State of Croatia" was established as a pro-Nazi government. It was dedicated to a clerical-fascist ideology influenced both by Nazism and...